Boat Design Forums  |  Boat Design Directory  |  Boat Design Gallery  |  Boat Design Book Store  |  Thanks to Our Site Sponsors

Go Back   Boat Design Forums > Design > Sailboats
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 01-23-2007, 10:49 PM
francis k francis k is offline
Junior Member
 
Join Date: Oct 2006
Rep: 10 Posts: 13
Location: florida
replacing diesel with lead to increase stability

I have a Pacific Seacraft 25. People generally use these on Great lakes, and Bays and coastal. There is room in the bottom of the bilge for more ballast at the bottom just aft of the normal ballast. I would like to remove the engine and fuel tank and replace w/lead. Can more ballast hurt if I keep the displacement the same. The lead would be just forward of the engine. The boat is 4750 displacement,1750 ballast,8 foot beam 3'3" draft,pointed stern. I need the extra storage space anyway. why not lead instead.
Reply With Quote
  #2  
Old 01-24-2007, 01:09 AM
RHough's Avatar
RHough RHough is offline
Retro Dude
 
Join Date: Nov 2005
Rep: 714 Posts: 1,622
Location: BC Summers / Nayarit Winters
Quote:
Originally Posted by francis k View Post
I have a Pacific Seacraft 25. People generally use these on Great lakes, and Bays and coastal. There is room in the bottom of the bilge for more ballast at the bottom just aft of the normal ballast. I would like to remove the engine and fuel tank and replace w/lead. Can more ballast hurt if I keep the displacement the same. The lead would be just forward of the engine. The boat is 4750 displacement,1750 ballast,8 foot beam 3'3" draft,pointed stern. I need the extra storage space anyway. why not lead instead.
Don't you need the engine more than you need storage?

Adding and equal amount of lead to the weight of the removed engine and tank should not hurt the boat.

Taking the engine out and fitting an outboard instead would ruin the boat.

Rowing a 4750 pound boat in and out of your slip might get tedious after the first few times.
__________________
Proud supporter of The Far Kurnell Cat Racing Team

I have not failed. I've just found 10,000 ways that won't work.
- Thomas A. Edison
Reply With Quote
  #3  
Old 01-24-2007, 10:42 PM
francis k francis k is offline
Junior Member
 
Join Date: Oct 2006
Rep: 10 Posts: 13
Location: florida
This is a small boat and I am taking it cruising ,carrying a lot of equipment. I would like to increase the stability and I am asking if my idea would make a notable difference. The engine is now considerably higher than the ballast so removing it would lower the center of gravity without adding the lead. I carry a lot of spares, anchors, chain, tools... maybe I should not add the lead.But just remove the engine. I don't know how to determine if I am overloading
Reply With Quote
  #4  
Old 01-25-2007, 12:55 AM
RHough's Avatar
RHough RHough is offline
Retro Dude
 
Join Date: Nov 2005
Rep: 714 Posts: 1,622
Location: BC Summers / Nayarit Winters
Quote:
Originally Posted by francis k View Post
This is a small boat and I am taking it cruising ,carrying a lot of equipment. I would like to increase the stability and I am asking if my idea would make a notable difference. The engine is now considerably higher than the ballast so removing it would lower the center of gravity without adding the lead. I carry a lot of spares, anchors, chain, tools... maybe I should not add the lead.But just remove the engine. I don't know how to determine if I am overloading
Cruising in an overloaded boat is certainly something to be avoided. You should be commended for taking that into consideration.

I would contact Pacific Seacraft and ask what they consider a safe load for the design. Then I'd weigh my stuff and only load the boat within it's design limits.

Good luck, it sounds like you are planning ahead. That's a good thing. I don't think that removing the engine would be wise.
__________________
Proud supporter of The Far Kurnell Cat Racing Team

I have not failed. I've just found 10,000 ways that won't work.
- Thomas A. Edison
Reply With Quote
Reply



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Increase efficiency of rotating shaft. Jigar111 Propulsion 2 11-14-2006 03:50 PM
Could a fan in front of a sail increase speed? RGClark Boat Design 3 07-21-2006 10:17 PM
rpms increase but boat wont go any faster sleepinducer01 Powerboats 2 05-06-2006 08:56 PM
Reduce resistance or increase propulsive efficiency RANCHI OTTO Boat Design 6 07-14-2005 11:25 AM
Replacing an iron keel with a lead keel. Kris-Stockholm Boatbuilding 4 06-21-2004 12:45 PM


All times are GMT -5. The time now is 07:54 PM.


Powered by: vBulletin Copyright ©2000 - 2012, Jelsoft Enterprises Ltd.
Web Site Design and Content Copyright ©1999 - 2012 Boat Design Net